Dan Kent Posted January 28, 2014 Report Share Posted January 28, 2014 Hey folks I need some help. I just picked up my plane from it's annual. Everything seems fine (I got the Dynon radio installed and so far really like it). Before flying home I did a test flight with the distributor of my airplane. Upon taxiing out to take off the plane started bouncing. I thought the plane had sat in cold weather for a while and the tires had developed a flat spot that would work its way out with more taxiing and that possibly the tires were low on air. The bouncing stopped on the takeoff roll. Test flight went fine, go the plane home and went flying this past Sunday. Before flying I checked the tire pressure on the mains and it was 29 psi. I fill them up to 35 psi (using the Dresser 6 ply tires). I had a fairly long taxi to take off and the bouncing was present again but not quite as severe, and thought over time it would smooth out. I took off and flew to a nearby field and did 3 full stop landings. Each time taxiing back to takeoff the bouncing would happen but only between 7-9 kts ground speed. Below this it was smooth and above this it was smooth. I contacted the mechanic that worked on the plane and he doesn't have any suggestions. He did change the brake pads on the left main, but it is not pulling when brakes are applied (I have toe brakes so I can brake each main differently). Also upon liftoff there is no vibration, which would indicate a wheel/tire balance problem. I was going to remove the tire pants this weekend and do a visual inspection and do some taxiing without them to see if the problem is still there. I was then going to put more air in them (probably 40 psi) to see if this diminishes the issue. Any ideas or suggestions? Link to comment Share on other sites More sharing options...
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